Numerical study of energy dissipation and block barriers in stepped spillways

被引:3
|
作者
Moghadam, Mehdi Karami [1 ]
Amini, Ata [2 ]
Moghadam, Ehsan Karami [3 ]
机构
[1] Payame Noor Univ, Dept Agr, Tehran, Iran
[2] AREEO, Kurdistan Agr & Nat Resources Res & Educ Ctr, Sanandaj, Iran
[3] Shahid Bahonar Univ, Dept Civil Engn, Kerman, Iran
关键词
energy dissipation; nappe flow; skimming flow; stepped spillway;
D O I
10.2166/hydro.2020.245
中图分类号
TP39 [计算机的应用];
学科分类号
081203 ; 0835 ;
摘要
In this research, the accuracy of the Flow-3D numerical model in the flow simulation in a stepped spillway was probed using data obtained from the physical model. In addition, the effects of block barriers on the energy dissipation rate were investigated. To adopt a proper turbulent model, Renormalization Group k-epsilon, RNG k-epsilon, and standard k-epsilon models were employed. Then, the Flow-3D was run in five discharges for nine spillways with the ratios of block length to step length (L-b/l) and block height to step height (H-b/h) as 0.3, 0.4, and 0.5. The results indicated that both turbulent models had almost similar outcomes though the run time of the RNG k-epsilon model was shorter. The blocks with a shorter length in low ratios of H-b/h and the lengthier blocks in high ratios of H-b/h undergo more relative energy dissipation relative to the no-block situation. For H-b/h = 0.3 and L-b/l equal to 0.3, 0.4, and 0.5, the relative energy dissipation climbed on average as 8.5, 6.5, and 4.5% respectively, compared with the no-block case. The most influence exerted on relative energy dissipation was obtained via the blocks with H-b/h = L-b/l equal to 0.3 and 0.5 with respective increases of 8.6 and 8.4%.
引用
收藏
页码:284 / 297
页数:14
相关论文
共 50 条
  • [21] EXPERIMENTAL STUDY OF ENERGY DISSIPATION OVER STEPPED GABION SPILLWAYS WITH LOW HEIGHTS
    Salmasi, F.
    Chamani, M. R.
    Zadeh, D. Farsadi
    IRANIAN JOURNAL OF SCIENCE AND TECHNOLOGY-TRANSACTIONS OF CIVIL ENGINEERING, 2012, 36 (C2) : 253 - 264
  • [22] Analysis of Energy Dissipation of Interval-Pooled Stepped Spillways
    Ma, Xin
    Zhang, Jianmin
    Hu, Yaan
    ENTROPY, 2022, 24 (01)
  • [23] Genetic algorithms for optimizing stepped spillways to maximize energy dissipation
    Salmasi, Farzin
    Abraham, John
    WATER SUPPLY, 2022, 22 (02) : 1255 - 1274
  • [24] Energy dissipation and flow characteristics of baffles and sills on stepped spillways
    Li, Shuai
    Zhang, Jianmin
    Nie, Jing
    Peng, Yong
    JOURNAL OF HYDRAULIC RESEARCH, 2014, 52 (01) : 140 - 142
  • [25] Energy Dissipation in Stepped Spillways with Different Horizontal Face Angles
    Peng, Yongqin
    Zhang, Xujin
    Yuan, Hao
    Li, Xia
    Xie, Chunhang
    Yang, Shuqing
    Bai, Zhaoliang
    ENERGIES, 2019, 12 (23)
  • [26] Energy dissipation and flow characteristics of baffles and sills on stepped spillways
    Zare, Hesham K.
    Doering, John C.
    JOURNAL OF HYDRAULIC RESEARCH, 2012, 50 (02) : 192 - 199
  • [27] Numerical Analysis of Pressure Profiles and Energy Dissipation across Stepped Spillways Having Curved Risers
    Saqib, Najam Us
    Akbar, Muhammad
    Pan, Huali
    Ou, Guoqiang
    Mohsin, Muhammad
    Ali, Assad
    Amin, Azka
    APPLIED SCIENCES-BASEL, 2022, 12 (01):
  • [28] Energy dissipation in stepped spillways using baffled stilling basins
    Nasralla T.H.
    ISH Journal of Hydraulic Engineering, 2022, 28 (03) : 243 - 250
  • [29] New Approach for Estimating of Energy Dissipation over Stepped Spillways
    Kavianpour, Mohammad Reza
    Masoumi, Hamid Reza
    INTERNATIONAL JOURNAL OF CIVIL ENGINEERING, 2008, 6 (03) : 226 - 233
  • [30] A FLOW-3D-Based Numerical Simulation of the Energy Dissipation Characteristics of Pooled Stepped Spillways
    Li, Jing
    Zhou, Yu
    Shu, Zhan
    Mao, Xin
    Xu, Minrong
    Ye, Zhaokai
    Ye, Jun
    2022 8TH INTERNATIONAL CONFERENCE ON HYDRAULIC AND CIVIL ENGINEERING: DEEP SPACE INTELLIGENT DEVELOPMENT AND UTILIZATION FORUM, ICHCE, 2022, : 989 - 994